$\text{⇒ Answer:}$
$\text{3. Most of the ethnic minorities live in the mountainous areas in}$
$\text{ the north.}$
$\text{4. The second largest ethnic group in Vietnam are Tay.}$
$\text{5. The Nung are known for their richness tradition of Folk-art}$
$\text{including music and poetry.}$
$\text{6. The Hmong-Dao people speak language of Dao language system.}$
$\text{7. The custume of the Nung is not as colorful as that of the}$
$\text{ethnic groups.}$
$\text{8. The Ede live in wooden longhouses built on stils in villages known}$
$\text{as buon.}$
$\text{-----Done by Lhghbebong-----}$
$\text{Cho anh xin câu trả lời hay nhất, 5 sao và cảm ơn nha.}$
$\text{Năn nỉ em.}$